The Lafayette Planning Commission is set to consider three major projects, including a proposed six-story mixed-use building at 3458 Mount Diablo Boulevard, which would replace a one-story commercial structure with 30 for-sale units. The project has been revised with stepbacks, additional street-level commercial frontage, and façade improvements. The other major project involves a proposed 6,160-square-foot two-story home on a vacant 7.93-acre parcel on Happy Valley Road, which requires removal of 10 protected trees, grading, and a lot line revision.